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The ceramal layer on the surface of mild steel was cladded by using a double-layer precoating method.

采用双层预涂覆方法在低碳钢表面激光熔覆金属陶瓷涂层。

Gradually, the home of the kitchen stove, cold and cheerless on a layer after layer of the earth.

渐渐地，厨房的火炉，在寒冷和307层的地层后回家。

Acid rain the ozone layer 空气污染 acidic pollution ozone air pollution causes of acid rain chemical products trees SO2 O2 HCl condition of the ozone layer effects of acid rain acidic rain àHow measure acids atmosphere

空气污染(学科：化学年级：高中三年级)执教者：市北中学徐云蕾 1、空气污染已经成为人们关注的话题，本节课主要讨论空气污染的两个方面：酸雨和臭氧层空洞。

Ozone Layer Success: Another indicator of success for Goal 7 is the world's consumption of chlorofluorocarbons, which are chemicals that deplete the ozone layer, the Earth's protective shield.

臭氧层成功：成功的另一个指标的目标7是世界上消费的氯氟化碳，这是化学品，消耗臭氧层，地球的保护伞。

The microstructures of iron surface are sinter layer, alloying chrome layer and matrix iron from surface.

由外向内，表层显微组织依次为烧结层、合金化层和基体层。

The depth of Cr layer had been 100μm. Metallurgy interface exists between matrix iron and alloying chrome layer.

该工艺可以使铬渗入到铸铁基体中达100μm以上，合金化层与基体具有良好的冶金结合。

The density was high in water layer of 50-200m and low in water layer of 500 -800m in Chukchi Sea.

在楚科奇海，毛颚类的层状分布以 5 0─ 2 0 0m层数量较高，5 0 0─ 80 0m层最低。

The method includes the following steps: a semiconductor basal body is provided and the insulating layer of the semiconductor basal body is plated with light-sensitive lacquer and then is exposed in light and at last is developed; etching process is carried out to make a through hole on the insulating layer; cineration process is done, the remanent light-sensitive lacquer is removed and the temperature for the cineration process is 20-50 DEG C; wet cleaning process is carried out.

该制造方法包括如下步骤：提供半导体基体，对半导体基体的绝缘层进行镀光刻胶步骤、曝光步骤、显影步骤；进行蚀刻步骤，在绝缘层上形成通孔；进行灰化步骤，将剩余的光刻胶移除，且灰化步骤的温度条件范围是20-50摄氏度；进行湿法清洗步骤。

The effects of processing parameters on the cladding layer were examined, and the layer microstructure was investigated.

分析了激光功率、扫描速度和光斑直径等工艺参数对熔覆效果的影响，观测了熔覆层的组织特征与性能。

At all the shrub layer and herb layer plants, both widely distributed in the cloud belt elevation fir forest types, there is also limited to certain types of spruce-fir forest types.

在所有灌木层和草本层植物中，既有广泛分布于各海拔带云冷杉林中的种类，也有仅限于某一云冷杉林类型中的种类。

We have something to do in the new stage.

在这段崭新的时期中，我们有一些要做的。

The difference between tourism decision-making under uncertainty and risky tourism decision-making is indistinctive.

其中不确定性旅游决策和风险旅游决策的界线比较模糊，两者的区分是相对的。